Fast high-resolution nuclear magnetic resonance spectroscopy through indirect zero-quantum coherence detection in inhomogeneous fields

• Published in: Chinese physics B 2014-06, Vol.23 (6), p.158-164
• Main Author: 柯汉平 陈浩 林雁勤 韦芝良 蔡淑惠 张志勇 陈忠
• Format: Article
• Language: English
• Subjects: Acquisitions; Coherence; Heterogeneity; Inhomogeneity; Marketing; Nuclear magnetic resonance; Spectra; Spectroscopy; 不均匀性; 核磁共振光谱; 核磁共振方法; 相干检测; 量子相干; 间接; 非均匀电场; 高分辨率光谱
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/23/6/063201

In many cases, high-resolution nuclear magnetic resonance （NMR） spectra are virtually impossible to obtain by con- ventional nuclear magnetic resonance methods because of inhomogeneity of magnetic field and inherent heterogeneity of sample. Although conventional intramolecular zero-quantum coherence （ZQC） can be used to obtain high-resolution spectrum in inhomogeneous field, the acquisition takes rather long time. In this paper, a spatially encoded intramolecular ZQC technique is proposed to fast acquire high-resolution NMR spectrum in inhomogeneous field. For the first time, the gradient-driven decoding technique is employed to selectively acquire intramolecular ZQC signals. Theoretical analyses and experimental observations demonstrate that high-resolution NMR spectral information can be retrieved within several scans even when the field inhomogeneity is severe enough to erase most spectral information. This work provides a new way to enhance the acquisition efficiency of high-resolution intramolecular ZQC spectroscopy in inhomogeneous fields.